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%I #5 Oct 04 2012 10:28:38
%S 1,4,9,21,42,86,171,358,715,1431
%N Height of lattice of parameters of mixed orthogonal arrays with 2^n runs and strength 2.
%H E. M. Rains, N. J. A. Sloane and J. Stufken, The Lattice of N-Run Orthogonal Arrays, J. Stat. Planning Inference, 102 (2002), 477-500 (<a href="http://neilsloane.com/doc/rao.txt">Abstract</a>, <a href="http://neilsloane.com/doc/rao.pdf">pdf</a>, <a href="http://neilsloane.com/doc/rao.ps">ps</a>)
%Y Cf. A039930, A048164.
%K nonn,nice
%O 0,2
%A _N. J. A. Sloane_, E. M. Rains, J. Stufken
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